Case 2: Managing Grade 4 LF Lameness with Tendon Injury and Structured Rehabilitation

OVERVIEW

The horse presented with

• Grade 4 LF lameness
• DDF tendon tear and associated tendonitis
• Prior annular ligament resection
• Ultrasound findings of fibrosis with evidence of a new tear

This combination of prior surgical alteration, active musculoskeletal tissue injury, and structural compromise created a complex clinical picture requiring both mechanical support and biologic intervention.

CLINICAL PRESENTATION

Initial evaluation

• Lameness was severe and clearly load-limiting, indicating significant discomfort within the affected limb.
• Ultrasound confirmed both chronic changes (fibrosis) and acute injury (new tear).
• Prior annular ligament resection suggested altered tendon mechanics and potential predisposition to reinjury.

This case reflects the compounding nature of musculoskeletal tissue injury when prior intervention and biomechanical stress are involved.

Day 0 · Visible swelling at presentation

TREATMENT APPROACH

The plan, in order

Given the severity and complexity of the injury, treatment focused on:

• Supporting the injured tendon at the site of damage
• Managing inflammation without introducing excessive joint stress
• Providing mechanical support through corrective shoeing
• Implementing a structured rehabilitation program to guide recovery

The treatment plan included:

• equicenta® CTM injection at the tear site
• Shoeing to extend heel support and reduce tendon strain
• Stall rest followed by controlled rehabilitation
• Ongoing monitoring and progression based on response

OUTCOME AT 30 DAYS

Early signs of progress

Day 30 · Reduced swelling, improving symmetry

At early re-evaluation:

• Improvement in symmetry and movement patterns was observed.
• Gait analysis indicated early positive response to treatment.
• The horse remained within a controlled rehabilitation phase.

These early indicators suggest a favorable initial response, particularly in a case involving both acute injury and pre-existing tissue compromise.

OUTCOME AT 90 DAYS

Cleared for under-saddle work

Day 90 · Symmetry restored, cleared for return to work

At follow-up:

• The horse was cleared for return to under-saddle work.
• Continued rehabilitation, including swimming, supported recovery without excessive load.
• Overall limb function improved significantly.

The horse was progressing back into performance work and preparing for transition to Wellington.

WHY THIS CASE MATTERS

Several considerations in equine musculoskeletal tissue injury

1. Prior intervention alters future risk

Previous annular ligament resection likely changed tendon mechanics, increasing susceptibility to reinjury. Understanding surgical history is essential in treatment planning.

2. Soft tissue injury is both acute and chronic

The presence of fibrosis alongside a new tear demonstrates how past damage and new injury often coexist, requiring a layered approach to care.

3. Structured rehabilitation is critical

Recovery was not driven by intervention alone, but by the combination of:

• Mechanical support
• Controlled loading
• Progressive rehabilitation

4. Biologic support enhances the environment for recovery

In cases like this, biologic therapies can:

• Support local tissue structure
• Modulate inflammatory response
• Contribute to a more favorable healing environment

CLINICAL TAKEAWAY

For horses presenting with

• Severe lameness
• Tendon injury with prior surgical history
• Evidence of both chronic and acute tissue damage

A comprehensive, multimodal approach is essential. This case demonstrates that even in complex musculoskeletal tissue injuries, it is possible to:

• Improve movement symmetry
• Progress safely through rehabilitation
• Return to performance activity

FINAL THOUGHT

Horse First. Sport Second.

At Equine Performance Labs, cases like this reinforce our core belief: because meaningful recovery isn’t just about returning to work — it’s about restoring stability, function, and confidence in every step forward.